The Cost-Benefit Analysis for the evaluation of public infrastructure projects. The case of the subway of Potenza

In the present work the economic feasibility of a project of public infrastructure, the expansion of the subway of the city Potenza, is estimated. The assessment has been developed through the application of the Cost-Benefit Analysis. As is known the advantage of this technique is the ability to express in monetary terms the externalities (positive and negative) generated by the project. In this case, the external cost savings related to the improvement of the mobility in the city have been internalized. The research has shown that the valuation of the externalities can be an effective way to manage the planning of new public transport infrastructure.